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88e17b57 | 1 | /* The implementation of class Object for Objective-C. |
748086b7 | 2 | Copyright (C) 1993, 1994, 1995, 1997, 2002, 2009 Free Software Foundation, Inc. |
88e17b57 | 3 | |
6c82ad25 | 4 | This file is part of GCC. |
88e17b57 | 5 | |
6c82ad25 | 6 | GCC is free software; you can redistribute it and/or modify it |
88e17b57 | 7 | under the terms of the GNU General Public License as published by the |
748086b7 | 8 | Free Software Foundation; either version 3, or (at your option) any |
88e17b57 BE |
9 | later version. |
10 | ||
6c82ad25 | 11 | GCC is distributed in the hope that it will be useful, but WITHOUT |
88e17b57 BE |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | License for more details. | |
15 | ||
748086b7 JJ |
16 | Under Section 7 of GPL version 3, you are granted additional |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
88e17b57 | 19 | |
748086b7 JJ |
20 | You should have received a copy of the GNU General Public License and |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
88e17b57 BE |
24 | |
25 | #include <stdarg.h> | |
b15b7ef8 | 26 | #include <errno.h> |
88e17b57 BE |
27 | #include "objc/Object.h" |
28 | #include "objc/Protocol.h" | |
29 | #include "objc/objc-api.h" | |
30 | ||
88e17b57 BE |
31 | #define MAX_CLASS_NAME_LEN 256 |
32 | ||
33 | @implementation Object | |
34 | ||
35 | + initialize | |
36 | { | |
37 | return self; | |
38 | } | |
39 | ||
40 | - init | |
41 | { | |
42 | return self; | |
43 | } | |
44 | ||
45 | + new | |
46 | { | |
47 | return [[self alloc] init]; | |
48 | } | |
49 | ||
50 | + alloc | |
51 | { | |
52 | return class_create_instance(self); | |
53 | } | |
54 | ||
55 | - free | |
56 | { | |
57 | return object_dispose(self); | |
58 | } | |
59 | ||
60 | - copy | |
61 | { | |
62 | return [[self shallowCopy] deepen]; | |
63 | } | |
64 | ||
65 | - shallowCopy | |
66 | { | |
67 | return object_copy(self); | |
68 | } | |
69 | ||
70 | - deepen | |
71 | { | |
72 | return self; | |
73 | } | |
74 | ||
75 | - deepCopy | |
76 | { | |
77 | return [self copy]; | |
78 | } | |
79 | ||
80 | - (Class)class | |
81 | { | |
82 | return object_get_class(self); | |
83 | } | |
84 | ||
85 | - (Class)superClass | |
86 | { | |
87 | return object_get_super_class(self); | |
88 | } | |
89 | ||
90 | - (MetaClass)metaClass | |
91 | { | |
92 | return object_get_meta_class(self); | |
93 | } | |
94 | ||
95 | - (const char *)name | |
96 | { | |
97 | return object_get_class_name(self); | |
98 | } | |
99 | ||
100 | - self | |
101 | { | |
102 | return self; | |
103 | } | |
104 | ||
105 | - (unsigned int)hash | |
106 | { | |
107 | return (size_t)self; | |
108 | } | |
109 | ||
110 | - (BOOL)isEqual:anObject | |
111 | { | |
112 | return self==anObject; | |
113 | } | |
114 | ||
c24aadf3 | 115 | - (int)compare:(id)anotherObject; |
88e17b57 BE |
116 | { |
117 | if ([self isEqual:anotherObject]) | |
118 | return 0; | |
119 | // Ordering objects by their address is pretty useless, | |
120 | // so subclasses should override this is some useful way. | |
b15b7ef8 | 121 | else if ((id)self > anotherObject) |
88e17b57 BE |
122 | return 1; |
123 | else | |
124 | return -1; | |
125 | } | |
126 | ||
127 | - (BOOL)isMetaClass | |
128 | { | |
129 | return NO; | |
130 | } | |
131 | ||
132 | - (BOOL)isClass | |
133 | { | |
134 | return object_is_class(self); | |
135 | } | |
136 | ||
137 | - (BOOL)isInstance | |
138 | { | |
139 | return object_is_instance(self); | |
140 | } | |
141 | ||
142 | - (BOOL)isKindOf:(Class)aClassObject | |
143 | { | |
144 | Class class; | |
145 | ||
146 | for (class = self->isa; class!=Nil; class = class_get_super_class(class)) | |
147 | if (class==aClassObject) | |
148 | return YES; | |
149 | return NO; | |
150 | } | |
151 | ||
152 | - (BOOL)isMemberOf:(Class)aClassObject | |
153 | { | |
154 | return self->isa==aClassObject; | |
155 | } | |
156 | ||
157 | - (BOOL)isKindOfClassNamed:(const char *)aClassName | |
158 | { | |
159 | Class class; | |
160 | ||
161 | if (aClassName!=NULL) | |
162 | for (class = self->isa; class!=Nil; class = class_get_super_class(class)) | |
163 | if (!strcmp(class_get_class_name(class), aClassName)) | |
164 | return YES; | |
165 | return NO; | |
166 | } | |
167 | ||
168 | - (BOOL)isMemberOfClassNamed:(const char *)aClassName | |
169 | { | |
170 | return ((aClassName!=NULL) | |
171 | &&!strcmp(class_get_class_name(self->isa), aClassName)); | |
172 | } | |
173 | ||
174 | + (BOOL)instancesRespondTo:(SEL)aSel | |
175 | { | |
176 | return class_get_instance_method(self, aSel)!=METHOD_NULL; | |
177 | } | |
178 | ||
179 | - (BOOL)respondsTo:(SEL)aSel | |
180 | { | |
181 | return ((object_is_instance(self) | |
182 | ?class_get_instance_method(self->isa, aSel) | |
183 | :class_get_class_method(self->isa, aSel))!=METHOD_NULL); | |
184 | } | |
185 | ||
186 | + (IMP)instanceMethodFor:(SEL)aSel | |
187 | { | |
188 | return method_get_imp(class_get_instance_method(self, aSel)); | |
189 | } | |
190 | ||
191 | // Indicates if the receiving class or instance conforms to the given protocol | |
192 | // not usually overridden by subclasses | |
193 | // | |
194 | // Modified 9/5/94 to always search the class object's protocol list, rather | |
195 | // than the meta class. | |
196 | ||
197 | + (BOOL) conformsTo: (Protocol*)aProtocol | |
198 | { | |
8f8c44cb | 199 | size_t i; |
88e17b57 BE |
200 | struct objc_protocol_list* proto_list; |
201 | id parent; | |
202 | ||
203 | for (proto_list = ((Class)self)->protocols; | |
204 | proto_list; proto_list = proto_list->next) | |
205 | { | |
206 | for (i=0; i < proto_list->count; i++) | |
207 | { | |
208 | if ([proto_list->list[i] conformsTo: aProtocol]) | |
209 | return YES; | |
210 | } | |
211 | } | |
212 | ||
213 | if ((parent = [self superClass])) | |
214 | return [parent conformsTo: aProtocol]; | |
215 | else | |
216 | return NO; | |
217 | } | |
218 | ||
219 | - (BOOL) conformsTo: (Protocol*)aProtocol | |
220 | { | |
221 | return [[self class] conformsTo:aProtocol]; | |
222 | } | |
223 | ||
224 | - (IMP)methodFor:(SEL)aSel | |
225 | { | |
226 | return (method_get_imp(object_is_instance(self) | |
227 | ?class_get_instance_method(self->isa, aSel) | |
228 | :class_get_class_method(self->isa, aSel))); | |
229 | } | |
230 | ||
231 | + (struct objc_method_description *)descriptionForInstanceMethod:(SEL)aSel | |
232 | { | |
233 | return ((struct objc_method_description *) | |
234 | class_get_instance_method(self, aSel)); | |
235 | } | |
236 | ||
237 | - (struct objc_method_description *)descriptionForMethod:(SEL)aSel | |
238 | { | |
239 | return ((struct objc_method_description *) | |
240 | (object_is_instance(self) | |
241 | ?class_get_instance_method(self->isa, aSel) | |
242 | :class_get_class_method(self->isa, aSel))); | |
243 | } | |
244 | ||
245 | - perform:(SEL)aSel | |
246 | { | |
247 | IMP msg = objc_msg_lookup(self, aSel); | |
248 | if (!msg) | |
249 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
250 | return (*msg)(self, aSel); | |
251 | } | |
252 | ||
253 | - perform:(SEL)aSel with:anObject | |
254 | { | |
255 | IMP msg = objc_msg_lookup(self, aSel); | |
256 | if (!msg) | |
257 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
258 | return (*msg)(self, aSel, anObject); | |
259 | } | |
260 | ||
261 | - perform:(SEL)aSel with:anObject1 with:anObject2 | |
262 | { | |
263 | IMP msg = objc_msg_lookup(self, aSel); | |
264 | if (!msg) | |
265 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
266 | return (*msg)(self, aSel, anObject1, anObject2); | |
267 | } | |
268 | ||
269 | - (retval_t)forward:(SEL)aSel :(arglist_t)argFrame | |
270 | { | |
b62cc13a | 271 | (void) argFrame; /* UNUSED */ |
88e17b57 BE |
272 | return (retval_t)[self doesNotRecognize: aSel]; |
273 | } | |
274 | ||
275 | - (retval_t)performv:(SEL)aSel :(arglist_t)argFrame | |
276 | { | |
277 | return objc_msg_sendv(self, aSel, argFrame); | |
278 | } | |
279 | ||
280 | + poseAs:(Class)aClassObject | |
281 | { | |
282 | return class_pose_as(self, aClassObject); | |
283 | } | |
284 | ||
285 | - (Class)transmuteClassTo:(Class)aClassObject | |
286 | { | |
287 | if (object_is_instance(self)) | |
288 | if (class_is_class(aClassObject)) | |
289 | if (class_get_instance_size(aClassObject)==class_get_instance_size(isa)) | |
290 | if ([self isKindOf:aClassObject]) | |
291 | { | |
292 | Class old_isa = isa; | |
293 | isa = aClassObject; | |
294 | return old_isa; | |
295 | } | |
296 | return nil; | |
297 | } | |
298 | ||
299 | - subclassResponsibility:(SEL)aSel | |
300 | { | |
301 | return [self error:"subclass should override %s", sel_get_name(aSel)]; | |
302 | } | |
303 | ||
304 | - notImplemented:(SEL)aSel | |
305 | { | |
306 | return [self error:"method %s not implemented", sel_get_name(aSel)]; | |
307 | } | |
308 | ||
309 | - shouldNotImplement:(SEL)aSel | |
310 | { | |
311 | return [self error:"%s should not implement %s", | |
312 | object_get_class_name(self), sel_get_name(aSel)]; | |
313 | } | |
314 | ||
315 | - doesNotRecognize:(SEL)aSel | |
316 | { | |
317 | return [self error:"%s does not recognize %s", | |
318 | object_get_class_name(self), sel_get_name(aSel)]; | |
319 | } | |
320 | ||
88e17b57 BE |
321 | - error:(const char *)aString, ... |
322 | { | |
323 | #define FMT "error: %s (%s)\n%s\n" | |
324 | char fmt[(strlen((char*)FMT)+strlen((char*)object_get_class_name(self)) | |
325 | +((aString!=NULL)?strlen((char*)aString):0)+8)]; | |
326 | va_list ap; | |
327 | ||
328 | sprintf(fmt, FMT, object_get_class_name(self), | |
329 | object_is_instance(self)?"instance":"class", | |
330 | (aString!=NULL)?aString:""); | |
331 | va_start(ap, aString); | |
332 | objc_verror(self, OBJC_ERR_UNKNOWN, fmt, ap); | |
333 | va_end(ap); | |
334 | return nil; | |
335 | #undef FMT | |
336 | } | |
337 | ||
338 | + (int)version | |
339 | { | |
340 | return class_get_version(self); | |
341 | } | |
342 | ||
343 | + setVersion:(int)aVersion | |
344 | { | |
345 | class_set_version(self, aVersion); | |
346 | return self; | |
347 | } | |
348 | ||
349 | + (int)streamVersion: (TypedStream*)aStream | |
350 | { | |
351 | if (aStream->mode == OBJC_READONLY) | |
352 | return objc_get_stream_class_version (aStream, self); | |
353 | else | |
354 | return class_get_version (self); | |
355 | } | |
356 | ||
357 | // These are used to write or read the instance variables | |
358 | // declared in this particular part of the object. Subclasses | |
359 | // should extend these, by calling [super read/write: aStream] | |
360 | // before doing their own archiving. These methods are private, in | |
361 | // the sense that they should only be called from subclasses. | |
362 | ||
363 | - read: (TypedStream*)aStream | |
364 | { | |
b62cc13a | 365 | (void) aStream; /* UNUSED */ |
88e17b57 BE |
366 | // [super read: aStream]; |
367 | return self; | |
368 | } | |
369 | ||
370 | - write: (TypedStream*)aStream | |
371 | { | |
b62cc13a | 372 | (void) aStream; /* UNUSED */ |
88e17b57 BE |
373 | // [super write: aStream]; |
374 | return self; | |
375 | } | |
376 | ||
377 | - awake | |
378 | { | |
379 | // [super awake]; | |
380 | return self; | |
381 | } | |
382 | ||
383 | @end |